// Copyright 2023 Specter Ops, Inc.
// 
// Licensed under the Apache License, Version 2.0
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// 
// SPDX-License-Identifier: Apache-2.0

package lab

import (
	"testing"

	"github.com/stretchr/testify/require"
)

func noOpSetup(*Harness) (any, error) {
	return nil, nil
}

func Test_hasCycle(t *testing.T) {
	assert := require.New(t)
	fixture0 := NewFixture(noOpSetup, nil)
	fixture1 := NewFixture(noOpSetup, nil)
	fixture2 := NewFixture(noOpSetup, nil)
	fixture3 := NewFixture(noOpSetup, nil)

	fixture0.Dependencies().Add(fixture1)
	fixture0.Dependencies().Add(fixture2)
	fixture1.Dependencies().Add(fixture2)
	fixture2.Dependencies().Add(fixture3)

	assert.True(hasCycle(fixture0, fixture0))
	assert.True(hasCycle(fixture3, fixture0))
	assert.False(hasCycle(fixture0, fixture3))
}
